Looks great. CodeMirror (http://codemirror.net/ http://codemirror.net/) is an amazing code editor OSS project by the same author. It powers Firefox and Chrome's

Looks great. CodeMirror (http://codemirror.net/ http://codemirror.net/) is an amazing code editor OSS project by the same author. It powers Firefox and Chrome's devtools and is used in hundreds of other sites and apps (including the one I'm working on :)). Direct link to ProseMirror's home page with live collaborative demo at the bottom: http://prosemirror.net/ http://prosemirror.net/ (click "Change" to select a room) And here's a link to the just-launched campaign to open source it (MIT license): https://www.indiegogo.com/projects/prosemirror/ https://www.indiegogo.com/projects/prosemirror/ . It's an all-or-nothing ("fixed") type indiegogo campaign, not the flexible kind where the funds are kept even if the goal isn't reached.